Supplied By www.heating spares.co Tel. 0161 620 6677
3
INTRODUCTION
Fig.1 General Layout
1
Discharge valve
2
Gas valve
3
Modulator coil
4
Pressure switch
5
Condense trap
6
Ignition transformer
7
Expansion vessel
8
Electrode
9
Main burner
10
Main heat exchanger
11
Latent heat collector
12
Flue gas analysis test point
13
Flue outlet
14
Air intake
15
Differential pressure switch
16
Silicone pressure tube (-)
17
Silicone pressure tube (+)
18
Fan assembly
19
CH NTC sensor
20
High limit thermostat
21
Combustion chamber
22
Condensate pressure switch
23
Auto air vent (AAV)
24
Pump
25
DHW flow switch
26
DHW sensor
27
Domestic hot water heat exchanger
28
Diverter valve motor
29
Pressure gauge
30
DHW position
31
Mode selector switch
32
Fault indicator led
33
CH position
34
Timeclock
The PRO Combi HE range of appliances is comprised of
2 models of high-efficiency combination boiler with inputs
to heating & DHW of 25, 29 kW respectively. Each appli-
ance - by design - incorporates electronic ignition, circu-
lating pump, expansion vessel, safety valve, pressure
gauge and automatic by-pass.
The PRO Combi HE range is produced as room sealed,
category II2H3P appliances, suitable for internal wall
mounting applications only. They are provided with a fan
powered flue outlet with an annular coaxial combustion air
intake that can be rotated - horizontally - through 360
degrees for various horizontal or vertical applications. The
PRO Combi HE range is approved for use with C12 & C32
type flue applications.
These appliances are designed for use with a sealed
system only; consequently they are not intended for use
on open vented systems
Fig. 1
29
30
31
33
34
32